Concentrator trunk preference circuit



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1. A TELEPHONE LINE CONCENTRATOR SYSTEM COMPRISING A TELEPHONE CENTRAL OFFICE, A PLURALITY OF REMOTE LINES, A SMALLER PLURALITY OF TRUNKS EXTENDING FROM SAID OFFICE, REMOTE SWITCHING MEANS FOR COUPLING SAID LINES TO SAID TRUNKS UNDER CONTROL OF SAID OFFICE, AND MEANS IN SAID OFFICE FOR PRESELECTING A PREFERRED TRUNK FOR CONNECTION TO A SERVICE REQUESTING LINE INCLUDING MEANS OPERABLE ON A FIRST CALL FOR PRESELECTING A DIFFERENT TRUNK IN A PREDETERMINED ORDER FOR CONNECTION TO ONE OF SAID LINES ON A SUBSEQUENT CALL AND ON SAID FIRST CALL AFTER A CONNECTION OF A PREFERRED TRUNK TO A SERVICE REQUESTING LINE. 